200 



Mil. F. H. beddaud on bahthwohms 



[Jan. 14, 



The spermidiieal glands extend through three segments ; they 

 are coarsely lobate, and the muscular duet is curved like a horse- 

 shoe ; there is no terminal sac. 



The ovaries are in segment xiii., and in the same segment are 

 a pair of rather large kidney-shaped egg-sacs. 



The spermathecce are four pairs in segments vi.-ix. The pouch, 

 which is pear-shaped, is sharply marked off from the narrow duct. 

 The diverticulum is rather longer than the latter, and ends in an 

 oval dilatation. 



Locality. Halemanu, Kauai. 



Remarl-s. — This species does not possess any very marked dis- 

 tinctive characters, excepting, perhaps, one which will be described 

 immediately. On the other hand, I cannot identify it with 

 certainty with any of the species already known that have four 

 pairs of spermathecce. 



I may take this opportunity of recording a peculiarity in the 

 sperm-ducts of Perichteta perlcinsi, which is new to the genus, and 

 does not therefore help in the identification of this species ; indeed, 

 so few species of Perichaita have been examined microscopically, 

 that the absence of the peculiar relations of the sperm-duct to the 

 spermiducal gland, which I am about to describe, in the species 



Fig. 1. 



Ferichata perkhm. 

 Spermiducal gland (pr.), vasa deferentia (v.d.), and muscular duct (M.) of 

 gland of Fericlimta perkinsi (left-hand figure) and of a normal Perichieta 

 (riglit-hand figure). 



already investigated, does not go for much. The two sperm-ducts 

 retain their separateness, and perforate the duct of the spermiducal 

 gland at some little distance from its external opening, but at a 

 point where it is already wrapped up in a moderately thick 

 coating of muscular fibres, not so thicic, however, as tliey will 

 ultimately become. The two sperm-ducts, however, do not at 



